package jnpf.dmsEntity.preview.enums;

import java.util.Locale;

/** Selects watermark handling. IMAGE candidates may still be rejected by the image codec. */
public enum DmsWatermarkTargetType {
    DOCX,
    PDF,
    IMAGE,
    UNSUPPORTED;

    public static DmsWatermarkTargetType fromFileName(String fileName) {
        return from(fileName, null);
    }

    public static DmsWatermarkTargetType from(String fileName, String mimeType) {
        String normalized = fileName == null ? "" : fileName.trim().toLowerCase(Locale.ROOT);
        int extensionSeparator = normalized.lastIndexOf('.');
        String extension = extensionSeparator < 0 || extensionSeparator == normalized.length() - 1
                ? "" : normalized.substring(extensionSeparator + 1);
        if ("docx".equals(extension)) {
            return DOCX;
        }
        if ("pdf".equals(extension)) {
            return PDF;
        }
        switch (extension) {
            case "bmp":
            case "gif":
            case "jpeg":
            case "jpg":
            case "png":
            case "webp":
                return IMAGE;
            default:
                break;
        }
        String normalizedMime = mimeType == null ? "" : mimeType.trim().toLowerCase(Locale.ROOT);
        int parameters = normalizedMime.indexOf(';');
        if (parameters >= 0) {
            normalizedMime = normalizedMime.substring(0, parameters).trim();
        }
        if ("application/vnd.openxmlformats-officedocument.wordprocessingml.document"
                .equals(normalizedMime)) {
            return DOCX;
        }
        if ("application/pdf".equals(normalizedMime)) {
            return PDF;
        }
        return normalizedMime.startsWith("image/") ? IMAGE : UNSUPPORTED;
    }
}